Climatological Report (Monthly)
Issued by NWS Grand Rapids, MI

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CXUS53 KGRR 082237 CCA
CLMGRR

CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS, MI
729 AM EDT SAT APR 1 2017

...................................

...THE GRAND RAPIDS MI (ASOS) CLIMATE SUMMARY FOR THE MONTH OF MARCH 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1892 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              87   03/21/2012
 LOW              -13   03/08/1943
HIGHEST            71   03/24        67       4       71  03/08
LOWEST             12   03/14         6       6        6  03/04
                        03/12
AVG. MAXIMUM     43.0              44.4    -1.4     49.7
AVG. MINIMUM     27.1              26.9     0.2     31.4
MEAN             35.0              35.6    -0.6     40.6
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      8               4.0     4.0        3
DAYS MIN <= 32     18              21.7    -3.7       16
DAYS MIN <= 0       0               0.1    -0.1        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         5.77   1948
 MINIMUM         0.08   1910
TOTALS           3.27              2.37    0.90     4.94
DAILY AVG.       0.11              0.08    0.03     0.16
DAYS >= .01        14              11.8     2.2       16
DAYS >= .10         9               6.2     2.8       12
DAYS >= .50         2               1.3     0.7        4
DAYS >= 1.00        0               0.3    -0.3        0
GREATEST
 24 HR. TOTAL    0.84   03/30 TO 03/30

SNOWFALL (INCHES)
RECORDS
 TOTAL           36.0   1965
 24 HR TOTAL     13.6   03/02/2002 TO 03/02/2002
 SNOW DEPTH        20   03/02/2014
TOTALS            4.7               8.3    -3.6     10.1
SINCE 7/1        59.7              73.1   -13.4     51.7
SNOWDEPTH AVG.      0                MM      MM        1
DAYS >= TRACE      12               6.4     5.6        7
DAYS >= 1.0         2               2.2    -0.2        2
GREATEST
 SNOW DEPTH         2   03/14                          7  03/02
                        03/13
 24 HR TOTAL      2.5   03/13 TO 03/13

DEGREE_DAYS
HEATING TOTAL     921               910      11      749
 SINCE 7/1       4975              5687    -712     4826
COOLING TOTAL       0                 1      -1        0
 SINCE 1/1          0                 1      -1        0

FREEZE DATES
RECORD
 EARLIEST     09/03/1946
 LATEST       06/04/1945
EARLIEST      03/01             10/13
LATEST                          05/02
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              11.5
RESULTANT WIND SPEED/DIRECTION   2/290
HIGHEST WIND SPEED/DIRECTION    51/250    DATE  03/08
HIGHEST GUST SPEED/DIRECTION    64/240    DATE  03/08

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   47
AVERAGE SKY COVER           0.70
NUMBER OF DAYS FAIR            6
NUMBER OF DAYS PC             10
NUMBER OF DAYS CLOUDY         15

AVERAGE RH (PERCENT)     67

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              4     MIXED PRECIP               1
HEAVY RAIN                3     RAIN                       9
LIGHT RAIN               16     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       2
LIGHT SNOW               10     SLEET                      1
FOG                      18     FOG W/VIS <= 1/4 MILE      1
HAZE                      9

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

&&

MARCH 2017 SAW THE TYPICAL ROLLER COASTER WEATHER THAT CAN BE
EXPECTED DURING THE TRANSITION FROM WINTER TO SPRING. TEMPERATURES
ENDED UP RATHER CLOSE TO AVERAGE WITH SOME FAIRLY COLD AND FAIRLY
WARM PERIODS. THE MONTH WAS MUCH MORE WET THAN USUAL... HOWEVER
SNOWFALL WAS LESS THAN NORMAL.

THERE WAS A COLD PERIOD FROM THE 10TH TO THE 17TH OF THE MONTH...
DURING WHICH THE TEMPERATURE AT GRAND RAPIDS FAILED TO CLIMB ABOVE
32 DEGREES FOR SIX DAYS IN A ROW. THIS IS QUITE UNUSUAL BY MARCH
STANDARDS. ON THE FLIP SIDE... THERE WERE MANY DAYS WITH
TEMPERATURES WILL INTO THE 50S SCATTERED THROUGHOUT THE MONTH. THE
WARMEST TEMPERATURE OF THE MONTH OCCURRED ON THE 24TH... WHEN MANY
LOCATIONS SAW HIGHS IN THE 70S.

THE WEATHER PATTERN WAS QUITE UNSETTLED AND PRECIPITATION OCCURRED
FREQUENTLY. THE GREATEST RAIN TOTALS FELL ACROSS SOUTHERN
MICHIGAN... WHERE TOTALS FOR THE MONTH SURPASSED 2 INCHES ABOVE
AVERAGE IN SOME SPOTS. ONLY A LITTLE OVER A HANDFUL OF DAYS SAW NO
PRECIPITATION AT ALL. THE FINAL WEEK OF THE MONTH PRODUCED THE MOST
RAINFALL. ACCUMULATING SNOW ONLY FELL ON A FEW OCCASIONS IN THE
EARLY TO MIDDLE PART OF THE MONTH.

THE BIGGEST WEATHER EVENT OF MARCH 2017 WAS A CLEAR SKY WIND STORM
ON MARCH 8. A WELL DEVELOPED LOW PRESSURE SYSTEM TO THE NORTH AND
HIGH PRESSURE TO THE SOUTH CREATED VERY STRONG PRESSURE GRADIENT
WINDS JUST ABOVE THE SURFACE. SURFACE HEATING FROM SUNSHINE IN A DRY
ZONE BEHIND A COLD FRONT HELPED MIX STRONG WINDS DOWN TO THE SURFACE
FROM MID MORNING TO LATE AFTERNOON. WIND GUSTS WERE RECORDED AS HIGH
AS 64 MPH AT THE AIRPORTS IN GRAND RAPIDS AND LANSING... AND EVEN
GREATER IN SOUTHEAST MICHIGAN. HOURS OF WIND GUSTS OVER 50 AND
OCCASIONALLY 60 MPH WERE FELT IN ALL AREAS NOT WITHIN 20 MILES OF
LAKE MICHIGAN. THIS CAUSED HUNDREDS OF THOUSANDS OF POWER OUTAGES
ACROSS THE STATE. IT WAS ONE OF THE GREATEST POWER LOSSES IN LOWER
MICHIGAN HISTORY... AFFECTING ABOUT ONE THIRD OF CUSTOMERS. THESE
WERE PERHAPS THE STRONGEST NON-THUNDERSTORM WIND GUSTS RECORDED
DURING MARCH IN THE PAST FEW DECADES OF REGULAR WEATHER
OBSERVATIONS.

$$

63/CAS


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